PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-05:57:40
G03     247.4          68.1                6.9 +/-    0.52       7.4 +/-    0.52  0.040 / 0.070
G09     304.0          20.1                3.5 +/-    1.34       7.6 +/-    1.34  0.040 / 0.050
G14     100.0          13.3                4.2 +/-    2.38      10.8 +/-    2.38  0.230 / 0.210
G16     133.6          58.2                8.7 +/-    0.73      10.0 +/-    0.73  0.110 / 0.170
G22     195.9          56.8                8.4 +/-    0.70       9.8 +/-    0.70  0.040 / 0.050
G23     317.5          47.0                5.9 +/-    0.85       7.8 +/-    0.85  0.040 / 0.040
G26     74.3           54.3                7.1 +/-    1.03       8.5 +/-    1.03  0.050 / 0.040
G31     51.1           22.0                3.7 +/-    2.31       7.7 +/-    2.31  0.050 / 0.050